Compound applicator for buffing machines



July 29, 1941. c. l. PACKER El'AL COMPOUND APPLICATOR FOE BUFFING MACHINES Filed March 2, 1940 s Sheets-Sheet 1 INVENTORS l CQffanZI-Idclrer sf'mllliifammerer 2%? ATTORNEY July 29, 1941'.

c. 1. PACKER ETAL 2,251,161

COMPOUND APPLICATOR FOR BUFFING MACHINES Filed March 2, 1940 3 Sheets-Sheet 2 I lNVENTORS I 29 v 126 H3] glqjggglrLPaclte r' ml, dimmer 7' l ////fi 7?' w 7 BY ATTORNEY Patented July 29, 1941 STTES PATENT OFFICE COP/WOUND APPLICATOR. FOR BUFFING MACHINES Connecticut A plication March 2, 1940, Serial No. 321,926

20 Claims.

This invention relates to bufilng and polishing machines, and more particularly to an improved automatic applicator for intermittently applying abradant bufiing or polishing compound to a rotating buffing wheel.

One object of the present invention is to provide adjustable means for varying the amount of compound which will be applied to a buffing wheel at each stroke of the applicator in accordance with the requirements of the work being buifed.

A further object is to provide an applicator of the above nature having means to vary the number of strokes of the applicator in a given interval of time.

A further object of this invention is to provide a compound applicator of the above nature having means to automatically stop the feeding of the compound whenever it is substantially used up.

A further object is to provide an automatic applicator of the above nature having a holder for an elongated cake of compound, which holder is open at both ends to permit very long cakes to be employed.

A still further object of this invention is to provide an improved compound applicator of the above nature which will be relatively inexpensive to manufacture, easy to adjust, simple in construction, accurately controlled, compact, gentle in operation, economical of compound, and very efiicient and durable in use.

With these and other objects in view, which will appear as the description proceeds, there has been illustrated in the accompanying drawings one form in which the invention may be conveniently embodied in practice.

In the drawings:

Fig, 1 illustrates a rotary bufiing machine having an improved compound applicator of this invention installed thereon.

Fig. 2 is a side elevation on an enlarged scale of the compound applicator by itself.

Fig. 3 is an end view of the same.

Fig. 4 is a sectional View taken on the line 4 3 of Fig. 2.

Fig. 4A is a side view of certain parts shown in section in Fig. 4.

Fig. 5 is a sectional view taken on the line 5-5 of Fig. 3.

Fig. 5A is a view partly in section of an alternative construction of the feed screw shown in Fig. 5.

Fig. 6 is a sectional view taken on the line 56 of Fig. 3.

Fig. 7 is a sectional view taken on the line l! of Fig. 2.

Fig. 8 is a diagram of the electrical circuits and controls for a bufiing machine having three buffing Wheels and applicators.

Referring now to the drawings wherein like reference numerals designate like parts throughout the several views, the numeral H] (see Fig. 1) denotes the frame of the buffing and polishing machine having a rotatable table ll mounted thereon, said table having a plurality of work holding spindles l2 upon its upper surface. The table II is adapted to be rotated by a motor I 3 through gears I l, I5, shaft l6, and a pinion I! in mesh with internal gear teeth IE on the table II, the motor I 3 being started and stopped by push buttons l9 and 2!) respectively.

A plurality of buifing or polishing wheels (three being herein shown) 2|, 22 and 23 are arranged about the table II upon suitable standards 2la, 22a and 23a, and are adapted to engage the work or articles to be buifed or polished, which are mounted on the spindles l2, the work being carried by said spindles successively past each of the wheels 2| 22, and 23 by the slow rotation of the table II. The Wheels 2|, 22 and 23 are driven by motors 24, 25, and 26 respectively, which are arranged to be started and stopped by push button switches 21, 28, 29, and 3|], 3|, 32 respectively.

Automatic applicators The mechanism employed to apply the abrasive or polishing compound in the form of a rec tangular semi-solid brick or block 33 to the polishing wheels 2|, 22, and 23, is shown in Fig. 1one such applicator being therein shown, but

it is to be understood that similar applicators may also be provided in operative association with the buffing wheels 2! and 22.

Each compound applicator of this invention includes a rectangular base plate 34 which is herein shown secured to a stationary part of the machine (in this instance a journal 35for the wheel shaft 36) by a suitable bracket 31 to which theplate 34 is shown secured by bolts 38. The journal 35, to which the plate 34. is secured, is adapted to be adjusted along with the respective buifing wheel 2| 22 or 23, to any desired angle, it being understood that the three bufling wheels will usually be adjusted at different angles for engaging difierent parts of the work carried by the spindles l2.

Referring now more particularly to Figs. 2-7 inclusive, the stationary base plate 34 is shown tively depending from the plate 49, and the links 7 Q and 46 being pivoted to the side flanges 52 and 53 respectively of a depending end portion 5? provided on the plate 49.

The plate -59 has a pair of transversely spaced apart arms 55 and 55 vertically upstanding from its forward end, and a pair of transversely spaced apart arms 5'! and 58 vertically upstanding from its intermediate portion. The arms 55, 59 and 57, 58 are in longitudinal alinement and are adapted to slidably support and retain the block or brick of compound 33 upon the plate 9.9. A cover bar 59 extends across the top of the arms 55 and 56, being secured thereto by screws E9 to overlie the top of the compound brick 33.

In order to support the brick of compound in its intermittent reciprocations, provision is made of a pair of parallel longitudinally-extending pads SI and I32 on the top of the plate 19 to support a brick clamping frame 63, U-shaped in cross section, the base 94 of which rides on the pads BI and B2 and the sides and 56 thereof extend upwardly and straddle the compound brick 33.

A cross bar Bl, suitably guided by the upstand- 5 ing sides 65 and 66, is adapted to seat upon the brick 33, and is pressed into clamping engagement therewith by a curved handle 66 which is pivoted by a pin 89 to a cover plate I3 extending across the brick 33 between the sides 1 S5 and 85, being secured thereto by screws TI. The handle 68 has a cam-shaped end 12 which is adapted to engage a cross bar 73, also suitably guided by the sides 65 and 65, to press it downwardly to compress coiled springs I4 and I5, arranged to react between this bar and the cross bar 51 to force the latter tightly against the compound brick 33, and it in turn against the base 5% to clamp the brick 33 securely in the U-shaped frame 63. The brick-holding frame I53 in its longitudinal sliding movements on the plate 49 is guided by rods 'lfi and 71, one at either side of the frame 63, and which extend through holes 18 and I9 provided in the sides 65 and 66 thereof for this purpose. extend between and are suitably secured to the arm 55, 5?, and the arms 56, 58 respectively by nuts 89.

Brick feed mechanism The clamp frame 63 with the compound brick 23 clamped thereto is adapted to be fed forwardly step by step to compensate for the amount of the brick 33 worn oil by the buffing whee-1 AI, 22

. Or 23, by means of a rotatable screw rod or shaft The rods 78 and H opening 89 formed in the plate 69. A threaded half-nut 89 is mounted in a rectangular socket 99 in the bracket 85, and is adapted to partly surround the threaded portion 82 to have its threads cooperate therewith, whereby the intermittent rotation of the rod 8| will serve to feed the frame 93 forwardly in steps along the plate 49.

The half-nut B9 is constantly urged into tight cooperating engagement with the threaded portion 82 of the screw rod 8| by means of a spring 9| coiled about a shank 92 of a handle 93 and reacting between the half-nut 89 and the end wall 94 of the bracket 85. The shank 92 is pivotally secured to the half-nut 89 by a pin 95 which passes transversely through the half-nut 89 and rides in an annular groove 96 formed in the end of the shank 92. The end wall 9d has a boss 91 on its outer surface through which the shank 92 passes, which boss has a bayonet slot 98 formed in its outer end (see Fig. 4A), into which a pin 99, extending from the shank 92, is adapted to enter and seat, when the half-nut 89 is in place, to lock said half-nut in tight engagement with the threads 82 of the rod 8!. The half-nut will thus be prevented from backing off or becoming disengaged from the feed screw.

When it is desired to release the half-nut 89 from its engagement with the threaded portion 82 of the shaft 8I so as to permit the brick-clamping frame 93 to be manually moved rearwardly to obtain another grip on the compound brick 33, it will only be necessary to twist the shank 92 about degrees by means of the handle 93 to release the pin 99 from the bayonet slot 98, and then pull the half-nut 89 away from the screw-threaded portion 82. To hold the half-nut B9 in such released position, the shank 92 will again be twisted by the handle 93 to dispose the pin 99 upon the outer end of the boss 91.

The bracket 85 is shown in position (Fig. i) to permit the handle 93 to extend outwardly from the left-hand side of the compound carrier plate 49, but it will be obvious that this construction may be reversed to permit the handle 93 to extend outwardly from the right-hand side if desired within the spirit and scope of the invention. This feature of the invention permits the applicators to be installed upon many different forms of bufling machines without interfering with other parts of the mechanism, and enables the applicators to be placed in convenient and accessible positions.

It will also be understood that due to the use of the links 43-, 44, 45 and 46, and the plates 3% and 49, the brick 33 will move in an arcuate path the plates 34 and 49 remaining parallel to each other at all times. To obtain this swinging re-- ciprocating movement toward and away from the polishing wheel, a cam roller I92 is rotatably mounted at the lower end of the depending end portion 54 of the plate d9 by a pin I93 extending from and fastened in said end portion 54.

The roller I92 is arranged to travel between the opposing camming flanges I94 and I of a cam H36, which cam is keyed to the shaft end I91 of a feed motor I98, I39, IIO by a key III, one motor being provided for each of the applicators for the polishing wheels 2 I, 22 and 23 respective-- ly. The feed motors I98, I69 and H0 are each of the well-known type which are generally termed ratio motors, and may include a speed reducer combined with a motor. The feed motors I08, I [I9 and I I9 are suspended by their upper bases from the stationary plate 34 by means of bolts I I2, and said motors are controlled by starting and stopping push button switches H3, H4, I I5, and H6, H1, H8 respectively.

The shape of the camming surfaces I 64 and I65 is preferably made such that the movement of the compound brick 33 toward and away from the polishing wheel 2!, 22, or 23 may be smooth and uniform or variable, as desired, and that said brick will impinge squarely against the respective polishing or bufiing wheel a sufiicient length of time to apply the desired amount of compound thereto.

In order to intermittently and automatically rotate the screw rod BI at each successive stroke of the compound brick against the buffing wheel, provision is made of a spring-pressed pawl H9 which engages a ratchet wheel I20, secured by a key I2I to the adjacent rear end of the shaft Bl. The pawl I I9 is adapted to engage a tooth of the ratchet wheel I26 and intermittently rotate the shaft 8| at each forward movement of the compound carrying plate 49-the pawl I I 9 then being swung back about the ratchet wheel I29 to its original position by the rearward movement of said cam-driven plate 49.

This rocking action of the pawl H9 is obtained by mounting it upon one end of a lever I22, which (as shown in Fig. 7) is rotatably mounted upon the rear end of the shaft 8|, the other end I23 of the lever I2I having a roller I24 which rides between the parallel flanges I25, I26 of a track I21 formed in the face of an adjustable angularly disposed swingable box member I28. The member I28 is adjustable angularly to vary the throw of the pawl H6, whereby the latter will swing over more or less of the teeth of the ratchet wheel I26 when the plate 49 moves rearwardly, and will thus serve to vary the amount the brick 33 is fed forwardly at each stroke of said plate 46. This is accomplished by pivoting the member I28 to a vertical flange I 26 (see Fig. 2) formed on the stationary plate 34 by a screw I39 which passes through the flange I29 and screw-threads into the member I28. As most clearly shown in Fig. 2, another screw I 3| also is screw-threaded into the member I28 and extends through an arcuate elongated slot I32 formed in the flange I26 for locking the member I28 in its angularly adjusted position.

In order to automatically stop the feed motor (I68, I59, H9) whenever the U-shaped brickholding frame 63 has reached its extreme forward position due to wearing off of the brick 33 by the buffing wheel, provision is made of a normally closed switch (I33, I34 and I35), one on each device, and a forwardly protruding lug I36 on each clamp 63. The lug I36 is adapted, when the clamp 63 is in its extreme forward position, to engage the operating arm I31 of the respective switches I33, I34, or I35 to open the same, and.

thus stop the respective feed motors I98, I69, or H8.

It is also within the scope of this invention to automatically stop the feed of the compound brick 33 by removing or omitting a number of threads from the threaded portion 82 of the shaft III, as shown at I06 in Fig. A. By means of this construction, when the compound brick clamping frame 63 reaches its extreme feeding position adjacent the vertical arms 55 and 56, the half-nut 89 will run off the threads of the threaded portion 82 and further feeding movement will be prevented. When this occurs, the operator will loosen the compound clamp by manipulation of the top curved handle 69, and by pulling on the handle 93, will draw the half-nut 89 away from the threaded portion 82 of the shaft M. The clamp 63 may then be moved rearwardly along the compound brick 33 as far as desired and again secured to the brick 33.

Electrical control apparatus To simultaneously stop all of the compound feeding motors I68, I99 and H0 whenever for any reason the main machine motor I3 stops, and thus prevent further wearing off of compound by the buffing wheels, provision is made of solenoid-operated switches or relays I38, I39, I45 (see Fig. 8) as will be described later.

Means are also provided to separately control the period of operation of the respective feed motors I98, I99, III] so as to vary the amount of compound applied to the different buffing wheels without changing the adjustment of the inclined box members I28. This is also shown in Fig. 8 and will be hereinafter more fully described.

In the electrical diagram of Fig. 8 the tableoperating motor I 3 is shown connected to the line wire LI by a conductor I4! and by a conductor I42 to a solenoid-controlled switch or relay I43. The switch I43 is connected by a conductor I 44 through the normally closed push button motor stopping switch 26 with the line wire L2. The feed motor stop switches I38, I39, I46, and I43 are all closed simultaneously by a solenoid I45 when it is energized by the closing of the normally open push button table-operating motor starting switch I9 which is connected by a conductor I46 to the line wire L2 and by a conductor I41 to one terminal of the solenoid I45, the other terminal of which is connected by a conductor I 48 to the line wire LI.

To sustain the energizing circuit through the solenoid I45 when the push button I9 is released, the circuit from the conductor I44 passes through a switch I49 also controlled by the solenoid I45, and which is connected by a conductor I50 to the same terminal to which the conductor I41 from the push button I 9 leads.

The applicator motor control switches I38, I39, and I48 controlled by the solenoid I45 are all connected to the line wire L2 by a common conductor I5I, and said control switches I38, I39, I49 are joined to separate motor speed control devices of any standard form indicated by the numerals I52, I53, and I54, by conductors I55, I56, and I51 respectively. The control devices I52, I53, and I54 are connected by conductors I58, I59, and I 69 respectively to the compound applicator feed motors I98, I69, and III].

The motors I96, I63, and H6 are connected by conductors I6I, I62, and I63 respectively to solenoid-controlled switches or relays I64, I65, and I66, which are in turn connected by conductors I61, I68, and I69 respectively to the normally closed push button motor stopping switches H6, H1, and H8. The feed motor switches H6, H1, and I I8 are connected by conductors I19, HI and I12 respectively to the line wire LI. The switches I64, I65, and I66 are controlled by solenoids I13, I14, and I15 respectively, which close said switches when energized. The solenoids I13, I14, and I15 are arranged to be energized by the normally open push button motor starting switches H3, H4 and H5 respectively by having one terminal of each of them connected to said solenoids by conductors I16, I11, and I18 respectively, the switches I I3, II 4, H5 being connected by conductors I19, I39 and I8I respectively to the line wire LI. The other terminals of the solenoids I13, I14, and I15 are connected by conductors I82, I83, and I84 to the normally closed compound carrier movement limiting switches I33, I34, and I35 respectively, which in turn are connected to the line wire L2 by conductors I85, I86, and I81 respectively.

To maintain the solenoids I13, I14, and I15 in energized condition, provision is made of switches I88, I89, and I90, controlled by these solenoids respectively, and said switches are connected to the normally closed stopping switches H6, H1, and H8 by the conductors I91, I68, and IE9, and to one terminal of said solenoids by conductors I9I, I92, and I93 respectively.

It will be obvious from the above, that by pressing the normally closed motor stopping push button 20, the solenoid I45 will be ale-energized, whereby the switch I43, controlling the table driving motor I3 and switches I38, I39, and I40 controlling the compound applicator motors I03, I09, and I I respectively, will also be opened and all of these motors will instantly stop. It will also be evident that, if any one of the brick-operated stop switches I33, I34, and I35 is opened by the lug I36 and its associated frame 93, the respective solenoids I'I3, I14, and I15 will be de energized to open the switches I94, I65, and IE9 respectively to stop the respective motors I88, I09,and I I9. Likewise, the manipulation of either of the normally closed switches H6, H1, or II8 will de-energize the respective solenoid I13, I14, or I15, to stop the respective feed motors I98, I09, and III].

The buffing wheel motors 24, 25, and 26 are connected to the line wire L2 by conductors I94, I95, and I96 respectively and to solenoid operated switches I91, I98, and I99 by conductors 208, 29I and 202 respectively. The switches I91, I 98, and I99 in turn are connected by conductors 203, 204, and 205 to the buffing wheel motor stopping push button switches 30, 3| and 32 respectively, which in turn are connected to the line wire LI by conductors 295, 201, and 298 respectively. Solenoids 299, 2H), and 2H control the switches I91, I98, and I99 respectively, and each has one of its terminals connected by a conductor 2I2 to the line wire L2. The other terminals of the solenoids 209, 2I9, and 2H are connected by conductors 2I3, 2I4, and 2I5 to the motor starting push button switches 21, 28, and 29 respectively, which in turn are connected to the line wire LI by conductors 2I6, 2I1, and H8 respectively. To sustain the solenoids 299, 2H], and 2H energized after the respective starting push button switches are released, provision is made of switches 2I9, 220, and 22I controlled by these solenoids, respectively. The switches 2I9, 229, and 22I are connected by conductors 222, 229, and 224 to the same solenoid terminal to which the conductors 2I3, 2M, and H lead, and by the conductors 203, 284, and 295 to the motorstopping push button switches 30, 3|, and 32.

Operation In operation, the articles to be buffed or polished will first be placed on the work-holding spindles I2, and the bufiing wheels 2I, 22, and 23 adjusted to engage the same as the table II revolves. Bricks 93 of compound will then be placed on the carrier plates 49 and locked in the clamps 93 in their extreme rearward positions. The table motor I3 will then be started by pressing the push button I9. This closes the relay switch I43 to sustain the operation of the motor I3, and also the relay switches I38, I39 and I49 to operate the compound applicator or feed motors I08, I99, and H0. The bufiing wheel driving motors 24, 25, and 26 will next be started by pressing the respective push buttons 21, 28, and 29. The applicator motors I08, I09, and III) may next be started by pressing the respective motor push buttons II3, H4, and H5.

When the applicator feed motors I99, I09, and III] are in motion, the cam I96 will continuously rotate to reciprocate the plate 49 and swing with it the compound brick 33 toward and away from the respective buffing wheel to apply compound thereto. The pawl II9 will actuate the ratchet wheel I29 on the screw rod 8| to intermittently feed the brick-holding frame 03 forwardly through the means of the cooperating half-nut 89. These operations will continue automatically until either the table motor I3 is stopped or the bricks 33 are substantially used up. If the table motor should stop, all of the compound applicator motors will also automatically stop, and when one of the bricks is substantially used up, the particular feed motor I08, I09, or III! will be stopped by the engagement of the lug I39 on the clamp 93 with the arm I31.

If a more rapid feed for any particular brick is desired, it will only be necessary to adjust the swingable member I28 to a greater angle, whereby the pawl I I9 will be caused to pass by a greater number of teeth of the ratchet wheel I28 and rotate the screw rod 8I a correspondingly greater amount. By means of the motor speed controls I52, I53, and I54, the motors I08, I99, and I40 may be driven faster or slower as desired, thus varying the reciprocating speed of the brick carrying plates 49 through the cams I95.

One advantage of the present invention is that the holder for the compound brick 33 may be readily replaced with a wider or narrower one according to the width of the bufiing wheel.

A further advantage is in the use of swingable links 43, 44, 45, and 46, which greatly reduces the friction between the moving parts.

While there have been disclosed in this specification two forms in which the invention may be embodied, it is to be understood that these forms are shown for the purpose of illustration only, and that the invention is not to be limited to the specific disclosures, but may be modified and embodied in various other forms without departing from its spirit. In short, the invention includes all the modifications and embodiments coming within the scope of the following claims.

Having thus fully described the invention, what is claimed as new and for which it is desired to obtain Letters Patent is:

1. In a buffing machine, a rotatable table having work-carrying spindles thereon, a plurality of buffing wheels disposed about said table and adapted to engage the work on said spindles, a compound applicator for each buffing wheel, a brick of abrasive compound carried by each applicator, means to reciprocate said bricks toward and away from the respective wheels to apply compound thereto, separate electric motors for reciprocating each of said compound applicators, separate control means to start and stop each of said motors, and interlocking switches in the circuits of said control means to stop all of said compound applicator motors simultaneously when said table is stopped.

2. In a bufiing machine, a rotatable table having work-carrying spindles thereon, a plurality of bufhng wheels disposed about said table and adapted to engage the work on said spindles, a compound applicator for each bufling wheel, a

brick of abrasive compound carried by each applicator, means to reciprocate said bricks to apply compound to their respective buifing wheels, separate electric motors for reciprocating each of said compound applicators, separate control means to start and stop each of said motors, separate electrical means in the circuit of each of the applicator motors to control the speed thereof, and means to stop simultaneously all of said compound applicator motors when said table is stopped.

3. In a buffing machine, a rotatable table having work-carrying spindles thereon, a plurality of buffing wheels disposed about said table and adapted to engage the work on said spindles, a compound applicator for each buffing wheel, a brick of compound carried by each applicator, means to reciprocate said bricks toward and from their respective bufling wheels to apply compound thereto at each stroke of said applicators, means to feed said bricks progressively farther on each successive stroke to compensate for the abrasive applied to the respective buffing wheels, separate electric motors for reciprocating each of said compound applicators, separate control means to start and stop each of said motors, and means controlled by the movement of each brick toward its respective buiiing wheel to stop the respective applicator motor when a predetermined amount of said compound is exhausted.

4. In a bufling machine, a rotatable table having work-carrying spindles thereon, a plurality of bufiing wheels disposed about said table and adapted to engage the work on said spindles, a compound applicator for each buifing wheel, means in each applicator to reciprocate a brick of compound toward and away from the respective butting wheel to apply compound thereto at each stroke thereof, means to feed said brick progressively farther on each successive stroke to compensate for the compound applied to the respective bufiing wheel, separate electric motors for reciprocating each of said compound applicators, switches to start and stop each of said motors, means responsive to the movement of each applicator toward its respective bufiing wheel to stop its corresponding applicator motor when the brick has worn oii to a predetermined length, and means to stop simultaneously all of said compound applicator motors when said table is stopped.

5. In a compound applicator for applying buffing compound to a rotatable buffing wheel, a stationary base plate, a movable compound-carry ng plate, a plurality of links for pivotally connecting the corners of said movable plate to said base plate, and means to reciprocate and swing said movable plate in a curved path, said movable plate remaining parallel to said base plate at all times.

6. In a compound applicator for applying buffing compound to a rotatable bufiing wheel, a stationary base plate, a movable compound-carrying plate, said movable plate being swingably supported on said base plate by a plurality of links pivotally connected to the sides thereof, a'cam roller secured to said movable plate, a rotatable cam for reciprocating said roller, and an electric motor mounted on said base plate to drive said cam.

7. In a compound applicator for applying buffing compound to a rotatable buffing wheel, a stationary base plate, a movable compound-carrying plate, said movable plate being swingably supported on said first plate by two pairs of pivoted links disposed at each end thereof, electric motor driven means to reciprocate and swing said movable plate parallel to said first plate, and means to advance the compound carried by said movable plate progressively farther at each stroke thereof. 7

8. In a compound applicator for applying a buffing compound to a rotatable bufiing wheel, a stationary base plate, a movable compound-carrying plate, said second plate being swingably supported on said first plate by two pairs of links pivoted to both of said plates at each end thereof, electric motor driven means to reciprocate and swing said movable plate relatively to said base plate, means to feed the compound carried by said movable plate lengthwise progressively farther at each successive stroke of said movable plate including a screw rod, a ratchet wheel se-v cured to said rod, a swingable pawl to rotate said ratchet wheel intermittently, and means mounted on said base plate for driving said pawl at each stroke of said movable plate to swing said pawl to rotate said ratchet wheel. v

9. In a compound applicator for applying a bufiing compound to .a rotatable buffing wheel, a stationary base plate, a movable compound-carrying plate, said second plate being swingably supported on said first plate by two pairs of links pivoted to both of said plates at each end thereof, electric motor driven means to reciprocateand swing said movable plate relatively .to said base plate, means to feed the compound carried by said movable plate lengthwise progressively farther at each successive stroke of said movable plate including a screw rod, a ratchet wheel secured to said rod, a swingable pawl to rotate said ratchet Wheel intermittently, and lever and cam means mounted on said base plate for driving said pawl at each stroke of said movable plate to swing said pawl to rotate said ratchet Wheel.

10. In a compound applicator forv applying buffing compound to a rotatable bufling wheel, a stationary base plate, a movable compoundcarrying plate, said movable plate being swingably supported on said first plate by a plurality of links pivoted to each plate, a cam roller carried at one end of said movable plate, a continuously driven rotatable cam for engagingsaid roller to reciprocate itand cause said, movable plate to swing and reciprocate relativelyto said. base plate, means to feed the compound carried by said movable plate lengthwise thereof progressively farther at each stroke thereof, in-. cluding a screw rod, a ratchet wheel secured to said rod, and lever and cam means mounted on said base plate to intermittently swing said pawl to rotate said ratchet wheel.

11. In a mechanism for successively applying abrasive or polishing compound to a buifing wheel, a frame, a reciprocating carrier for a brick of compound mounted in said frame, said carrier having a bracket secured thereto, an intermittently rotated screw rodjournaled in said bracket, a nut sector movably carried in said bracket and having detachable engagement with said screw rod to permit the carrier to be moved rearwardly Whenever it is necessary to replace an exhausted brick with a new one, and means to selectively lock the detachable nut sector either in or out of engagement with said screw rod, said carrier being open at both ends to permit the clamping of a brick of greater length than said carrier.

12. In a mechanism for successively applying.

abrasive or polishing compound to a bufiing wheel, a frame, a reciprocating carrier for a brick of compound mounted in said frame, said carrier having a bracket secured thereto, an intermittently rotated screw rod journaled in said bracket, a nut sector slidable in said bracket and having detachable engagement with said screw rod to permit the carrier to be moved rearwardly whenever it is necessary to replace an exhausted brick with a new one, a radial rod secured to said detachable nut sector, said rod carrying a pin, said carrier having a guide collar embracing said rod and having a bayonet slot for releasably receiving said pin, whereby said sector may be selectively locked either in or out of engagement with said screw rod.

13. In a mechanism for successively applying abrasive 0r polishing compound to a hurling wheel, a frame, a reciprocating carrier for a brickof compound mounted in said frame, a half nut slidably mounted in said carrier, an intermittently rotated screw rod fitted in said nut to cause said carrier to advance said brick progressively farther at each successive stroke, said nut being detachable from said screw rod to release the carrier whenever it is necessary to replace an exhausted brick with a new one, a radial rod pivotally secured to said detachable half nut, said rod carrying a pin, said carrier having a guide collar embracing said rod and having a bayonet slot for releasably receiving said pin, whereby said half nut may be selectively locked either in or out of engagement with said screw rod.

14, In a mechanism for successively applying abrasive or polishing compound to a buffing wheel, a frame, a reciprocating carrier for a brick of compound mounted in said frame, said carrier having a half nut slidably secured thereto, an intermittently rotated screw rod fitted in said nut to cause said. carrier to advance said brick progressively farther at each successive stroke, said nut being laterally detachable from said screw rod to release the carrier for rearward movement whenever it is necessary to replace an exhausted brick with a new one, a radial spring-pressed rod secured to said detachable half nut, said rod carrying a pin, said carrier having a guide collar embracing said rod and having a bayonet slot for releasably receiving said pin, whereby said half nut may be selectively locked either in or out of engagement with said screw rod.

15. In a mechanism for applying abrasive or polishing compound to a bufling wheel, a frame, a carrier for an elongated brick of compound slidably mounted in said frame, said carrier including a U-shaped member for engaging the intermediate portion of said brick, and means in the top of said member to releasably clamp said brick therein, said carrier being open at both ends to permit the use of a brick of length greater than said carrier.

16. In a mechanism for applying compound to a bufling wheel, a frame for attachment adjacent said wheel, and a carrier for an elongated brick of compound slidably mounted in said frame, said carrier including a short detachable clamp for the intermediate portion of said brick, said carrier being open at both ends to permit the use of a brick of length greater than said carrier.

1'7. In a mechanism for applying compound to a bufiing wheel, a frame for attachment adjacent said wheel, and a carrier for an elongated brick of compound slidably mounted in said frame, said carrier including a short detachable spring-pressed clamp for the intermediate portion of said brick, said carrier being open at both ends to permit the use of a brick of length greater than said carrier:

18. In a mechanism for applying compound to a buffing wheel, a frame for attachment adjacent said wheel, a carrier for an elongated brick of compound slidably mounted in said frame, said carrier including a short detachable clamp for the intermediate portion of said brick, and manually operated means to releasably lock said clamp in brick-clamping position, said carrier being open at both ends to permit the use of a brick of length greater than said carrier.

19. In a compound applicator for a buffing wheel, a frame for attachment adjacent said Wheel, a carrier for a brick of compound slidably mounted in said frame, and motor and cam operated means to reciprocate said carrier to successively force said brick against said buffing wheel, said carrier being open at both ends to permit the use of a brick of length greater than said carrier.

20. In a compound applicator for a buffing wheel, a frame for attachment adjacent said wheel, a carrier for a brick of compound slidably mounted in said frame, and motor driven means to reciprocate said carrier to successively force said brick against said buffing wheel, said Y carrier being open at both ends to permit the use of a brick of length greater than said carrier.

CLIFFORD I. PACKER. EMIL H. KAMMERER. 

